354739621 has 2 divisors, whose sum is σ = 354739622. Its totient is φ = 354739620.

The previous prime is 354739613. The next prime is 354739661. The reversal of 354739621 is 126937453.

It is a happy number.

It is an a-pointer prime, because the next prime (354739661) can be obtained adding 354739621 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 353816100 + 923521 = 18810^2 + 961^2 .

It is a cyclic number.

It is not a de Polignac number, because 354739621 - 2³ = 354739613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (354739601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177369810 + 177369811.

It is an arithmetic number, because the mean of its divisors is an integer number (177369811).

Almost surely, 2^354739621 is an apocalyptic number.

It is an amenable number.

354739621 is a deficient number, since it is larger than the sum of its proper divisors (1).

354739621 is an equidigital number, since it uses as much as digits as its factorization.

354739621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 40.

The square root of 354739621 is about 18834.5326727264. The cubic root of 354739621 is about 707.8967186581.

The spelling of 354739621 in words is "three hundred fifty-four million, seven hundred thirty-nine thousand, six hundred twenty-one".